Primary Purpose
| primary_purpose | Study_Count |
|---|---|
| Treatment | 1600 |
| Supportive Care | 66 |
| Prevention | 49 |
| Basic Science | 46 |
| Other | 43 |
| NA | 34 |
| Health Services Research | 33 |
| Diagnostic | 19 |
| Educational/Counseling/Training | 4 |
| Screening | 4 |
| Device Feasibility | 1 |
Craig Mayer, Nick WIlliams, Vojtech Huser
Lister Hill National Center for Biomedical Communications, National Library of Medicine, NIH, Bethesda, MD
See the full regCTG repository at https://github.com/lhncbc/CRI/tree/master/regCTG
To return to the list of conditions and view other reports go to https://lhncbc.github.io/CRI/regCTG/regCTG-condition_report_links.html
| Type | Study_count |
|---|---|
| Total_Studies | 2269 |
| interventional | 1899 |
| Observational | 345 |
| Registry | 25 |
```
| intervention_type | Study_Count |
|---|---|
| Device | 332 |
| Drug | 331 |
| Other | 262 |
| Drug|placebo | 237 |
| Procedure | 188 |
| Behavioral | 113 |
| Biological | 65 |
| Dietary Supplement|placebo | 30 |
| Biological|Drug | 27 |
| Device|Other | 27 |
| Device|Drug | 25 |
| Device|placebo | 25 |
| Biological|placebo | 23 |
| Dietary Supplement | 23 |
| Drug|Other | 18 |
| Behavioral|Other | 17 |
| Drug|Procedure | 17 |
| Device|Procedure | 12 |
| Other|placebo | 12 |
| Other|Procedure | 10 |
| Diagnostic Test | 8 |
| Biological|Other | 7 |
| placebo|Procedure | 6 |
| Biological|Device | 5 |
| Biological|Procedure | 5 |
| Dietary Supplement|Drug | 5 |
| Behavioral|Device | 4 |
| Behavioral|Procedure | 4 |
| Biological|Drug|placebo | 4 |
| Dietary Supplement|Drug|placebo | 4 |
| Radiation | 4 |
| Combination Product | 3 |
| Device|Other|placebo | 3 |
| Behavioral|Biological | 2 |
| Behavioral|Drug | 2 |
| Biological|Drug|Procedure | 2 |
| Combination Product|Device | 2 |
| Device|Dietary Supplement|Other|Procedure | 2 |
| Drug|Other|placebo | 2 |
| Genetic | 2 |
| placebo | 2 |
| Behavioral|Device|Other | 1 |
| Behavioral|Device|placebo | 1 |
| Behavioral|Dietary Supplement|placebo | 1 |
| Behavioral|Drug|Genetic|Other | 1 |
| Behavioral|Drug|Other | 1 |
| Behavioral|Drug|Other|Procedure | 1 |
| Behavioral|Other|Procedure | 1 |
| Behavioral|placebo | 1 |
| Biological|Device|Drug | 1 |
| Combination Product|Other | 1 |
| Combination Product|placebo | 1 |
| Device|Diagnostic Test | 1 |
| Device|Drug|Other | 1 |
| Device|Drug|placebo | 1 |
| Device|Drug|Procedure | 1 |
| Device|Other|placebo|Procedure | 1 |
| Device|Other|Procedure | 1 |
| Device|Procedure|Radiation | 1 |
| Diagnostic Test|Procedure | 1 |
| Dietary Supplement|Drug|Other|placebo | 1 |
| Dietary Supplement|Other | 1 |
| Dietary Supplement|Other|placebo | 1 |
| Dietary Supplement|Procedure | 1 |
| Drug|Other|Procedure | 1 |
| Drug|placebo|Procedure | 1 |
| Drug|placebo|Radiation | 1 |
| Other|placebo|Procedure | 1 |
| Country | Study_Count |
|---|---|
| United States | 620 |
| NA | 183 |
| Canada | 115 |
| Denmark | 85 |
| Korea, Republic of | 63 |
| Brazil | 59 |
| Taiwan | 49 |
| United Kingdom | 45 |
| Spain | 44 |
| China | 42 |
| France | 37 |
| Germany | 32 |
| Italy | 31 |
| Sweden | 28 |
| Turkey | 27 |
| Thailand | 23 |
| Netherlands | 22 |
| Norway | 22 |
| Switzerland | 18 |
| Belgium | 16 |
| Finland | 16 |
| Japan | 15 |
| Egypt | 14 |
| India | 13 |
| United States|Canada | 13 |
| Australia | 12 |
| Iran, Islamic Republic of | 12 |
| Hong Kong | 10 |
| Israel | 10 |
| Pakistan | 8 |
| Ireland | 6 |
| Poland | 6 |
| Russian Federation | 6 |
| Singapore | 6 |
| Mexico | 5 |
| Austria | 4 |
| Hungary | 4 |
| Indonesia | 4 |
| Malaysia | 4 |
| Portugal | 4 |
| United States|United Kingdom | 4 |
| Argentina | 3 |
| Chile | 3 |
| Czechia|Poland | 3 |
| France|Germany | 3 |
| Jordan | 3 |
| South Africa | 3 |
| United States|Australia | 3 |
| Belgium|France | 2 |
| Canada|United Kingdom | 2 |
| Cyprus | 2 |
| Estonia | 2 |
| Germany|Netherlands|United Kingdom | 2 |
| Germany|Switzerland | 2 |
| Greece | 2 |
| Hungary|Poland | 2 |
| Lebanon | 2 |
| Lithuania | 2 |
| New Zealand | 2 |
| Philippines | 2 |
| Romania | 2 |
| Serbia | 2 |
| United States|Czechia|Denmark | 2 |
| United States|Germany | 2 |
| United States|Puerto Rico | 2 |
| United States|Puerto Rico|Romania | 2 |
| Vietnam | 2 |
| Armenia | 1 |
| Australia|Austria|Czech Republic|Finland|Germany|Hungary|Israel|Netherlands|New Zealand|Poland|Slovakia|South Africa|Spain|Sweden|Turkey | 1 |
| Australia|Canada|Netherlands Antilles | 1 |
| Australia|Germany | 1 |
| Australia|Taiwan | 1 |
| Austria|Belgium|Canada|Czechia|Spain | 1 |
| Austria|Belgium|Italy|Norway | 1 |
| Austria|Canada|Spain|United Kingdom | 1 |
| Austria|France|Germany|Spain | 1 |
| Austria|Germany|Sweden | 1 |
| Austria|Poland|Spain | 1 |
| Belgium|Brazil|Canada|China|Colombia|Costa Rica|Croatia|Czech Republic|Ecuador|Estonia|France|Germany|Greece|Guatemala|Hong Kong|India|Korea, Republic of|Latvia|Lithuania|Netherlands|Panama|Peru|Portugal|Russian Federation|Serbia|Singapore|South Africa|Spain|Sweden|Taiwan|Ukraine|United Kingdom | 1 |
| Belgium|Czech Republic|Italy|Poland|Switzerland | 1 |
| Belgium|Czechia|Denmark|Hong Kong|Moldova, Republic of | 1 |
| Belgium|Czechia|Finland|Germany|Hungary|Spain | 1 |
| Belgium|Czechia|Germany|Hungary|Spain|United Kingdom | 1 |
| Belgium|Denmark|Germany|Italy|Netherlands|Norway|Spain|Switzerland|Turkey|United Kingdom | 1 |
| Belgium|France|Germany|Israel|Italy|Netherlands | 1 |
| Belgium|France|United Kingdom | 1 |
| Belgium|Germany|Hungary|Italy|Poland | 1 |
| Belgium|Netherlands | 1 |
| Belgium|Poland | 1 |
| Bulgaria|Canada|Croatia|Finland|Germany|Poland|Serbia|South Africa|Sweden | 1 |
| Bulgaria|Denmark|Finland|South Africa|Sweden|United Kingdom | 1 |
| Bulgaria|Georgia|Germany|Moldova, Republic of | 1 |
| Bulgaria|Georgia|Germany|Moldova, Republic of|Romania|United Kingdom | 1 |
| Canada|Germany|Netherlands|United Kingdom | 1 |
| Canada|Sweden|United Kingdom | 1 |
| Costa Rica | 1 |
| Czech Republic|Belgium|France|Germany|Netherlands|United Kingdom | 1 |
| Czech Republic|France|Germany|Italy|Slovakia|Switzerland | 1 |
| Czech Republic|Germany|Poland|United Kingdom | 1 |
| Czech Republic|Hungary|Poland | 1 |
| Czech Republic|Romania|Slovakia|United Kingdom | 1 |
| Czechia | 1 |
| Czechia|Denmark|Estonia|Hong Kong|Poland|Romania | 1 |
| Denmark|Finland|Sweden | 1 |
| Denmark|Germany|Spain|Sweden | 1 |
| Denmark|Korea, Republic of|Netherlands|Norway|Spain|Sweden | 1 |
| Denmark|Netherlands|United Kingdom | 1 |
| Denmark|Sweden | 1 |
| Denmark|United Kingdom | 1 |
| Estonia|Latvia|Lithuania|Poland|Romania|Ukraine | 1 |
| Finland|Poland | 1 |
| Finland|United Kingdom | 1 |
| France|Germany|Italy|Spain | 1 |
| France|Germany|Poland|Spain|United Kingdom | 1 |
| France|Netherlands|United Kingdom | 1 |
| Germany|Italy|Netherlands | 1 |
| Germany|Spain|United Kingdom | 1 |
| Germany|Sweden|United Kingdom | 1 |
| Germany|United Kingdom | 1 |
| Hong Kong|Korea, Republic of|Philippines | 1 |
| Hungary|United Kingdom | 1 |
| India|Singapore|United Kingdom | 1 |
| Israel|United Kingdom | 1 |
| Italy|Austria|Bulgaria|Finland|France|Germany|Hungary|Japan|Poland|Portugal|Romania|Slovakia|Spain|Sweden|United Kingdom | 1 |
| Italy|Switzerland | 1 |
| Myanmar | 1 |
| New Zealand|United States|Australia|Canada|Germany|Hungary|Italy|Japan|Lithuania|Portugal|Russian Federation|Serbia|Slovakia|Spain|Sweden | 1 |
| Poland|United States|United Kingdom | 1 |
| Portugal|Austria|Croatia|Germany|Hungary|Italy|Latvia|Netherlands|Poland|Romania|Slovakia|Spain|United Kingdom | 1 |
| Portugal|Spain | 1 |
| Puerto Rico | 1 |
| Puerto Rico|United States | 1 |
| Saudi Arabia | 1 |
| Slovenia | 1 |
| United States|Argentina|Australia|Belgium|Canada|Czech Republic|Germany|Hungary|Italy|Peru|Poland|Russian Federation|Slovakia|Spain | 1 |
| United States|Argentina|Czechia|Denmark|Estonia|Hong Kong|Poland|Romania | 1 |
| United States|Australia|Brazil|Bulgaria|Colombia|Croatia|Japan|Korea, Republic of|Serbia|Lithuania|Mexico|New Zealand|Peru|Philippines|Russian Federation|Slovakia|Taiwan|Ukraine | 1 |
| United States|Australia|Canada | 1 |
| United States|Australia|Canada|Chile|Puerto Rico | 1 |
| United States|Australia|Canada|Czechia|Germany|Hungary|Korea, Republic of|Poland|Spain|Sweden|United Kingdom | 1 |
| United States|Australia|Canada|Denmark|Estonia|Hong Kong|Lithuania|Romania | 1 |
| United States|Australia|Canada|New Zealand | 1 |
| United States|Australia|Finland|France|Germany|Italy|Netherlands|United Kingdom | 1 |
| United States|Australia|Netherlands | 1 |
| United States|Austria|Belgium|France|Germany|Italy|Spain|Sweden|Switzerland|United Kingdom | 1 |
| United States|Austria|Czech Republic|Germany|Poland | 1 |
| United States|Belgium|Brazil|Canada|Chile|Colombia|France|United Kingdom | 1 |
| United States|Belgium|Canada|Czechia|Netherlands|Poland|Spain|United Kingdom | 1 |
| United States|Belgium|Hungary|Israel|Italy|Poland|Romania|Serbia | 1 |
| United States|Brazil|United Kingdom | 1 |
| United States|Bulgaria|Chile|Estonia|Hong Kong|Hungary|Lithuania|Poland|Romania|Russian Federation|South Africa|Spain|Ukraine|United Kingdom | 1 |
| United States|Canada|Finland|Germany|Italy|Switzerland | 1 |
| United States|Canada|France|Germany|United Kingdom | 1 |
| United States|Canada|Germany|Italy|United Kingdom | 1 |
| United States|Canada|Hungary|New Zealand|Poland|United Kingdom | 1 |
| United States|Canada|Puerto Rico | 1 |
| United States|Canada|Sweden | 1 |
| United States|Czech Republic|Germany|Italy | 1 |
| United States|Czechia|Denmark|Sweden | 1 |
| United States|Denmark | 1 |
| United States|Denmark|Germany|Hungary|Lithuania|Poland|Romania|Russian Federation|South Africa|Spain|Ukraine|United Kingdom | 1 |
| United States|Finland|France|Germany | 1 |
| United States|Georgia|Moldova, Republic of|Poland|Ukraine | 1 |
| United States|Germany|Greece|Puerto Rico|Romania|Russian Federation|Spain|Sweden | 1 |
| United States|Germany|Netherlands|Poland|United Kingdom | 1 |
| United States|Greece|Russian Federation|Sweden | 1 |
| United States|Poland|Spain|United Kingdom | 1 |
| United States|Poland|United Kingdom | 1 |
| United States|South Africa | 1 |
| United States|Spain|United Kingdom | 1 |
| Site_count | Study_Count |
|---|---|
| 1 | 1347 |
| 2 | 123 |
| 3 | 64 |
| 4 | 48 |
| 5 | 45 |
| 6 | 16 |
| 7 | 16 |
| 8 | 10 |
| 9 | 9 |
| 10 | 15 |
| 11 | 10 |
| 12 | 12 |
| 13 | 13 |
| 14 | 3 |
| 15 | 3 |
| 16 | 7 |
| 17 | 2 |
| 18 | 3 |
| 19 | 5 |
| 20 | 4 |
| 21 | 4 |
| 22 | 6 |
| 23 | 7 |
| 24 | 4 |
| 25 | 4 |
| 26 | 4 |
| 27 | 6 |
| 28 | 5 |
| 29 | 4 |
| 30 | 4 |
| 31 | 2 |
| 32 | 3 |
| 33 | 6 |
| 34 | 6 |
| 35 | 3 |
| 36 | 5 |
| 37 | 1 |
| 38 | 3 |
| 40 | 4 |
| 41 | 1 |
| 42 | 3 |
| 43 | 1 |
| 44 | 5 |
| 45 | 1 |
| 47 | 1 |
| 48 | 4 |
| 49 | 1 |
| 51 | 1 |
| 52 | 1 |
| 53 | 1 |
| 55 | 1 |
| 56 | 2 |
| 57 | 3 |
| 59 | 1 |
| 61 | 1 |
| 64 | 2 |
| 65 | 3 |
| 68 | 1 |
| 69 | 1 |
| 72 | 1 |
| 73 | 2 |
| 74 | 1 |
| 79 | 1 |
| 81 | 1 |
| 83 | 2 |
| 85 | 1 |
| 86 | 1 |
| 87 | 2 |
| 88 | 1 |
| 93 | 1 |
| 94 | 1 |
| 96 | 1 |
| 100 | 2 |
| 117 | 1 |
| 124 | 1 |
| 139 | 1 |
| 148 | 2 |
| 171 | 1 |
| 183 | 1 |
| 195 | 1 |
| 507 | 1 |
| 777 | 1 |
| Phase | Study_Count |
|---|---|
| N/A | 1017 |
| Phase 3 | 261 |
| Phase 2 | 214 |
| Phase 4 | 204 |
| Phase 1 | 105 |
| Phase 1/Phase 2 | 54 |
| Phase 2/Phase 3 | 34 |
| Early Phase 1 | 10 |
| Number_of_Arms | Count_of_Studies |
|---|---|
| 1 | 280 |
| 2 | 1081 |
| 3 | 247 |
| 4 | 108 |
| 5 | 17 |
| 6 | 10 |
| 7 | 1 |
| 8 | 2 |
| 9 | 2 |
| 10 | 1 |
| 16 | 1 |
| NA | 149 |
| Count of Versions | Count of Studies |
|---|---|
| 1 | 271 |
| 2 | 294 |
| 3 | 274 |
| 4 | 229 |
| 5 | 202 |
| 6 | 129 |
| 7 | 112 |
| 8 | 76 |
| 9 | 50 |
| 10 | 48 |
| 11 | 45 |
| 12 | 24 |
| 13 | 26 |
| 14 | 13 |
| 15 | 23 |
| 16 | 15 |
| 17 | 8 |
| 18 | 8 |
| 19 | 9 |
| 20 | 6 |
| 21 | 2 |
| 22 | 3 |
| 23 | 2 |
| 24 | 1 |
| 25 | 2 |
| 26 | 3 |
| 27 | 1 |
| 28 | 1 |
| 29 | 2 |
| 30 | 2 |
| 31 | 3 |
| 32 | 1 |
| 34 | 1 |
| 35 | 1 |
| 36 | 1 |
| 38 | 1 |
| 40 | 3 |
| 44 | 1 |
| 48 | 1 |
| 67 | 1 |
| 75 | 3 |
| 77 | 1 |
| Change Type | Count_of_Changes | Count_of_Studies | ratio |
|---|---|---|---|
| Study Status | 8482 | 1628 | 5.210074 |
| Contacts/Locations | 3887 | 1306 | 2.976263 |
| Recruitment Status | 2300 | 1321 | 1.741105 |
| None (earliest Version on record) | 1899 | 1899 | 1.000000 |
| Study Design | 1608 | 1123 | 1.431879 |
| Outcome Measures | 1265 | 810 | 1.561728 |
| Sponsor/Collaborators | 919 | 628 | 1.463376 |
| Arms | 895 | 635 | 1.409449 |
| Interventions | 895 | 635 | 1.409449 |
| Eligibility | 780 | 542 | 1.439114 |
| Study Identification | 749 | 509 | 1.471513 |
| Study Description | 700 | 507 | 1.380671 |
| Oversight | 600 | 480 | 1.250000 |
| References | 341 | 213 | 1.600939 |
| Conditions | 289 | 225 | 1.284444 |
| Results | 265 | 265 | 1.000000 |
| More Information | 251 | 140 | 1.792857 |
| IPDSharing | 182 | 168 | 1.083333 |
| Results Submission Events | 107 | 107 | 1.000000 |
| Documents | 67 | 64 | 1.046875 |
| Baseline Characteristics | 61 | 53 | 1.150943 |
| Reported Adverse Events | 55 | 47 | 1.170213 |
| Participant Flow | 47 | 37 | 1.270270 |
| 2020 Study Status | 2 | 2 | 1.000000 |
| Quality Control Review has not concludedReturned: May 1 | 2 | 2 | 1.000000 |
| Measure | Early.Phase.1 | N.A | Phase.1 | Phase.1.Phase.2 | Phase.2 | Phase.2.Phase.3 | Phase.3 | Phase.4 |
|---|---|---|---|---|---|---|---|---|
| Min. | 9.00000 | 1.0000 | 2.00 | 10.00000 | 1.0000 | 6.0000 | 18.0000 | 5.0000 |
| 1st Qu. | 20.00000 | 40.0000 | 15.75 | 25.50000 | 51.5000 | 60.0000 | 160.0000 | 60.0000 |
| Median | 22.00000 | 70.0000 | 31.00 | 40.00000 | 100.0000 | 101.5000 | 342.5000 | 111.0000 |
| Mean | 33.77778 | 176.6832 | 45.70 | 69.42593 | 219.9206 | 161.4412 | 593.9921 | 269.0837 |
| 3rd Qu. | 43.00000 | 135.0000 | 56.00 | 81.25000 | 216.7500 | 217.5000 | 603.5000 | 196.0000 |
| Max. | 86.00000 | 25876.0000 | 340.00 | 457.00000 | 4000.0000 | 626.0000 | 23498.0000 | 8067.0000 |
| group_type | Group_Count |
|---|---|
| Experimental | 1771 |
| Active Comparator | 1131 |
| Placebo Comparator | 510 |
| Other | 184 |
| No Intervention | 161 |
| NA | 149 |
| Sham Comparator | 70 |
| intervention_model | Study_Count |
|---|---|
| Parallel Assignment | 1436 |
| Single Group Assignment | 327 |
| Crossover Assignment | 83 |
| Factorial Assignment | 33 |
| Sequential Assignment | 10 |
| NA | 10 |
| primary_purpose | Study_Count |
|---|---|
| Treatment | 1600 |
| Supportive Care | 66 |
| Prevention | 49 |
| Basic Science | 46 |
| Other | 43 |
| NA | 34 |
| Health Services Research | 33 |
| Diagnostic | 19 |
| Educational/Counseling/Training | 4 |
| Screening | 4 |
| Device Feasibility | 1 |
| Country | Study_Count |
|---|---|
| United States | 108 |
| NA | 38 |
| France | 25 |
| Denmark | 24 |
| United Kingdom | 15 |
| Germany | 8 |
| Canada | 7 |
| Italy | 6 |
| Switzerland | 6 |
| China | 5 |
| Spain | 5 |
| Brazil | 4 |
| Egypt | 4 |
| Israel | 4 |
| Japan | 4 |
| Korea, Republic of | 4 |
| Sweden | 4 |
| Australia | 3 |
| Belgium | 3 |
| Hong Kong | 3 |
| Netherlands | 3 |
| Norway | 3 |
| Turkey | 3 |
| United States|Canada | 3 |
| Germany|Switzerland | 2 |
| South Africa | 2 |
| United States|Australia|New Zealand|United Kingdom | 2 |
| Argentina|Colombia|Korea, Republic of|Malaysia|Mexico|Philippines|Russian Federation|Thailand|Venezuela|Vietnam | 1 |
| Australia|Canada|France | 1 |
| Austria|Canada|France|Korea, Republic of|United Kingdom | 1 |
| Austria|France|Germany|Italy|United Kingdom | 1 |
| Austria|France|Germany|Netherlands|Spain|United Kingdom | 1 |
| Austria|Germany | 1 |
| Austria|Germany|Spain | 1 |
| Belarus | 1 |
| Belgium|Canada|France|Spain|United Kingdom | 1 |
| Belgium|Denmark|Finland|Germany|Netherlands|Spain|United Kingdom | 1 |
| Belgium|Finland|Germany|Netherlands|Norway|Spain|Switzerland|United Kingdom | 1 |
| Belgium|Finland|Spain|United Kingdom | 1 |
| Belgium|France | 1 |
| Belgium|France|Germany|Greece|Italy|Netherlands|Norway|Spain|Sweden|Switzerland|Turkey|United Kingdom | 1 |
| Belgium|Italy|Netherlands|Norway|United Kingdom | 1 |
| Belgium|Netherlands | 1 |
| Canada|Sweden | 1 |
| Colombia | 1 |
| Croatia|Czech Republic|Estonia|Russian Federation|Slovakia | 1 |
| Finland | 1 |
| France|Germany|Netherlands|Switzerland | 1 |
| France|Germany|Switzerland | 1 |
| France|Netherlands|Norway|Spain | 1 |
| Germany|Italy|United Kingdom | 1 |
| Germany|Netherlands|Poland | 1 |
| Germany|Netherlands|Poland|United Kingdom | 1 |
| Germany|Slovakia | 1 |
| Germany|Sweden | 1 |
| Hungary | 1 |
| India|Italy|Korea, Republic of | 1 |
| Italy|Luxembourg | 1 |
| Norway|Sweden | 1 |
| Philippines | 1 |
| Portugal | 1 |
| Romania | 1 |
| Russian Federation | 1 |
| Slovenia | 1 |
| Taiwan | 1 |
| Thailand | 1 |
| United States|Australia|Austria|Belgium|Canada|Germany|Hong Kong|Korea, Republic of|Malaysia|New Zealand|Singapore|Switzerland|Thailand|United Kingdom | 1 |
| United States|Australia|Italy|South Africa|United Kingdom | 1 |
| United States|Austria|Canada|France|Germany|Ireland|Netherlands|New Zealand|United Kingdom | 1 |
| United States|France|Germany|Ireland|Netherlands|Spain | 1 |
| United States|France|Spain|United Kingdom | 1 |
| United States|Germany | 1 |
| United States|Italy|Poland | 1 |
| United States|United Kingdom | 1 |
| Site_count | Study_Count |
|---|---|
| 1 | 239 |
| 2 | 18 |
| 3 | 15 |
| 4 | 12 |
| 5 | 15 |
| 6 | 11 |
| 7 | 3 |
| 8 | 9 |
| 9 | 2 |
| 10 | 1 |
| 11 | 2 |
| 12 | 2 |
| 13 | 1 |
| 14 | 2 |
| 15 | 2 |
| 16 | 1 |
| 18 | 1 |
| 20 | 2 |
| 22 | 1 |
| 36 | 1 |
| 62 | 1 |
| 85 | 1 |
| 96 | 1 |
| 244 | 1 |
| 320 | 1 |
| Count of Versions | Count of Studies |
|---|---|
| 1 | 64 |
| 2 | 65 |
| 3 | 53 |
| 4 | 34 |
| 5 | 29 |
| 6 | 19 |
| 7 | 12 |
| 8 | 11 |
| 9 | 13 |
| 10 | 10 |
| 11 | 6 |
| 12 | 3 |
| 13 | 4 |
| 14 | 5 |
| 15 | 3 |
| 16 | 1 |
| 18 | 2 |
| 19 | 2 |
| 20 | 1 |
| 21 | 1 |
| 23 | 1 |
| 24 | 2 |
| 33 | 2 |
| 37 | 1 |
| 41 | 1 |
| Change Type | Count_of_Changes | Count_of_Studies | ratio |
|---|---|---|---|
| Study Status | 1404 | 281 | 4.996441 |
| Contacts/Locations | 583 | 222 | 2.626126 |
| None (earliest Version on record) | 345 | 345 | 1.000000 |
| Recruitment Status | 342 | 218 | 1.568807 |
| Study Design | 244 | 164 | 1.487805 |
| Outcome Measures | 145 | 108 | 1.342593 |
| Eligibility | 127 | 89 | 1.426966 |
| Sponsor/Collaborators | 113 | 81 | 1.395062 |
| Study Description | 100 | 70 | 1.428571 |
| Groups | 97 | 70 | 1.385714 |
| Interventions | 97 | 70 | 1.385714 |
| Study Identification | 86 | 64 | 1.343750 |
| Oversight | 72 | 65 | 1.107692 |
| Conditions | 56 | 46 | 1.217391 |
| More Information | 25 | 8 | 3.125000 |
| IPDSharing | 23 | 21 | 1.095238 |
| References | 20 | 15 | 1.333333 |
| Results | 19 | 19 | 1.000000 |
| Documents | 6 | 6 | 1.000000 |
| Baseline Characteristics | 3 | 3 | 1.000000 |
| Results Submission Events | 3 | 3 | 1.000000 |
| Reported Adverse Events | 2 | 1 | 2.000000 |
| Participant Flow | 1 | 1 | 1.000000 |
| Measure | Observational |
|---|---|
| Min | 1.000 |
| 1st Qu | 50.000 |
| Median | 125.000 |
| Mean | 1390.207 |
| 3rd Qu | 262.500 |
| Max | 178214.000 |
| observational_model | Study_Count |
|---|---|
| Cohort | 214 |
| Case-Only | 39 |
| Case-Control | 24 |
| Case Control | 23 |
| Other | 19 |
| NA | 19 |
| Case-Crossover | 2 |
| Ecologic or Community | 2 |
| Case Control, Natural History | 1 |
| Family-Based | 1 |
| Natural History | 1 |
| time_perspective | Study_Count |
|---|---|
| Prospective | 237 |
| Retrospective | 49 |
| Cross-Sectional | 38 |
| NA | 10 |
| Other | 9 |
| Longitudinal, Retrospective | 1 |
| Longitudinal, Retrospective/Prospective | 1 |
| Country | Study_Count |
|---|---|
| NA | 5 |
| China | 3 |
| Denmark | 3 |
| Turkey | 2 |
| United Kingdom | 2 |
| United States | 2 |
| Australia|Korea, Republic of | 1 |
| Austria | 1 |
| Belgium|Germany|Israel | 1 |
| France | 1 |
| Japan | 1 |
| Netherlands | 1 |
| Sweden | 1 |
| Thailand | 1 |
| Site_count | Study_Count |
|---|---|
| 1 | 18 |
| 2 | 3 |
| 4 | 3 |
| 8 | 1 |
| Count of Versions | Count of Studies |
|---|---|
| 1 | 8 |
| 2 | 4 |
| 3 | 2 |
| 4 | 3 |
| 5 | 2 |
| 6 | 2 |
| 8 | 1 |
| 10 | 1 |
| 11 | 1 |
| 12 | 1 |
| Change Type | Count_of_Changes | Count_of_Studies | ratio |
|---|---|---|---|
| Study Status | 72 | 17 | 4.235294 |
| None (earliest Version on record) | 25 | 25 | 1.000000 |
| Contacts/Locations | 23 | 11 | 2.090909 |
| Recruitment Status | 18 | 12 | 1.500000 |
| Study Design | 14 | 9 | 1.555556 |
| Outcome Measures | 4 | 4 | 1.000000 |
| Oversight | 4 | 3 | 1.333333 |
| Study Description | 4 | 3 | 1.333333 |
| Study Identification | 4 | 4 | 1.000000 |
| Sponsor/Collaborators | 2 | 1 | 2.000000 |
| Conditions | 1 | 1 | 1.000000 |
| Groups | 1 | 1 | 1.000000 |
| Interventions | 1 | 1 | 1.000000 |
| Measure | Registries |
|---|---|
| Min | 2.0 |
| 1st Qu | 80.0 |
| Median | 350.0 |
| Mean | 17688.8 |
| 3rd Qu | 848.0 |
| Max | 288276.0 |
| observational_model | Study_Count |
|---|---|
| Cohort | 15 |
| Case-Control | 3 |
| Case-Crossover | 2 |
| Case Control | 2 |
| Other | 2 |
| Ecologic or Community | 1 |
| time_perspective | Study_Count |
|---|---|
| Prospective | 17 |
| Other | 5 |
| Cross-Sectional | 3 |
| target_duration | Study_Count |
|---|---|
| 2 Years | 4 |
| 5 Years | 4 |
| 1 Year | 3 |
| 10 Years | 2 |
| 12 Months | 2 |
| 1 Day | 1 |
| 12 Years | 1 |
| 14 Days | 1 |
| 15 Years | 1 |
| 2 Months | 1 |
| 20 Years | 1 |
| 24 Months | 1 |
| 3 Months | 1 |
| 8 Weeks | 1 |
| 90 Days | 1 |